Photonic phase correctors based on grating couplers: proof of concept simulations and preliminary performance metrics

Momen Diab; Ross Cheriton; Suresh Sivanandam

doi:10.1117/12.2642529

29 August 2022 Photonic phase correctors based on grating couplers: proof of concept simulations and preliminary performance metrics

Momen Diab, Ross Cheriton, Suresh Sivanandam

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121858Q (2022) https://doi.org/10.1117/12.2642529
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

We report on simulations carried out for an integrated phase corrector that can efficiently couple the light distorted by atmospheric turbulence into a single-mode fiber (SMF). The photonic integrated circuit (PIC) consists of a square array of surface grating couplers used to deflect the off-plane wave vector of the free-space beamlets into the plane of a single-mode waveguide in the chip. Resistive elements acting as heaters are subsequently used to stretch a coiled section of the individual waveguides and, in doing so, shift the phase of the propagating modes. With the correct phase shifts applied to the channels — each corresponding to a subaperture on a telescope pupil — the channels can be coherently combined, and the collected light can be delivered to one output SMF. In an adaptive optics (AO) system, the phase corrector would act as a deformable mirror (DM) commanded by a controller that takes phase measurements from a wavefront sensor (WFS).

Citation Download Citation

Momen Diab, Ross Cheriton, and Suresh Sivanandam "Photonic phase correctors based on grating couplers: proof of concept simulations and preliminary performance metrics", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121858Q (29 August 2022); https://doi.org/10.1117/12.2642529

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available